Abstract
Certain conclusions drawn by Llewellyn-Thomas (1959) regarding Ss giving successively longer or successively shorter reproductions of time intervals when their judgments were used as the standards for each succeeding trial are proposed here to be based on differences in curve forms which were an artifact of the plotting method. His data were replotted, and rather than showing great differences between two Ss whom he selected as representative of two types of responders, indicated a great deal of similarity between them. Judgment drift, the tendency to give successively longer judgments as a function of repeated estimates, is discussed as an alternative hypothesis to account for his data.

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